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100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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Vendor Reset - Vendor Specific Reset
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Copyright (C) 2020 Geoffrey McRae <geoff@hostfission.com>
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Copyright (C) 2020 Adam Madsen <adam@ajmadsen.com>
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "vendor-reset-dev.h"
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#include "vendor-reset-ioctl.h"
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#include <linux/miscdevice.h>
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#include <linux/uaccess.h>
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#define VENDOR_RESET_IOCTL_DEVNAME "vendor_reset"
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static long vendor_reset_ioctl_reset(struct file * filp, unsigned long arg)
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{
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struct vendor_reset_ioctl iodev;
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const struct vendor_reset_cfg *cfg;
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struct pci_dev * dev;
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int ret;
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if (copy_from_user(&iodev, (void __user *)arg, sizeof(iodev)))
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return -EFAULT;
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dev = pci_get_domain_bus_and_slot(iodev.domain, iodev.bus, iodev.devfn);
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if (!dev)
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return -ENODEV;
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cfg = vendor_reset_cfg_find(dev->vendor, dev->device);
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if (!cfg)
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{
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ret = -EOPNOTSUPP;
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goto err;
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}
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ret = vendor_reset_dev(cfg, dev);
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err:
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pci_dev_put(dev);
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return ret;
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}
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static long vendor_reset_ioctl(struct file * filp, unsigned int ioctl,
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unsigned long arg)
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{
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long ret;
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switch(ioctl)
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{
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case VENDOR_RESET_RESET:
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ret = vendor_reset_ioctl_reset(filp, arg);
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break;
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default:
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ret = -ENOTTY;
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break;
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}
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return ret;
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}
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static const struct file_operations vendor_reset_ioctl_fops =
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{
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.owner = THIS_MODULE,
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.unlocked_ioctl = vendor_reset_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = vendor_reset_ioctl,
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#endif
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};
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static struct miscdevice vendor_reset_ioctl_misc =
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{
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.minor = MISC_DYNAMIC_MINOR,
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.name = VENDOR_RESET_IOCTL_DEVNAME,
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.fops = &vendor_reset_ioctl_fops
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};
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int vendor_reset_ioctl_init(void)
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{
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return misc_register(&vendor_reset_ioctl_misc);
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}
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void vendor_reset_ioctl_exit(void)
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{
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misc_deregister(&vendor_reset_ioctl_misc);
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}
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